﻿1863.] 
  

  

  EGERTOX 
  1CI1THYOUTES 
  FKOM 
  NEW 
  SOUTH 
  WALES. 
  

  

  5 
  

  

  Coal-measures 
  (there 
  is 
  good 
  evidence 
  of 
  a 
  third), 
  and 
  nine 
  from 
  

   the 
  Permian 
  system. 
  Palceoniscus 
  and 
  Pyc/opterus 
  are 
  common 
  to 
  

   Europe 
  and 
  America; 
  but 
  Acrolepis 
  and 
  Platysomus 
  have 
  not 
  yet 
  

   been 
  recorded 
  beyond 
  the 
  confines 
  of 
  Europe, 
  unless 
  some 
  of 
  the 
  

   Kussian 
  species 
  may 
  be 
  from 
  the 
  Asiatic 
  territories 
  of 
  that 
  empire. 
  

   Taking 
  the 
  four 
  genera 
  in 
  combination, 
  the 
  localities 
  in 
  which 
  they 
  

   are 
  associated 
  in 
  greatest 
  numbers 
  are 
  the 
  Kupferschiefer 
  beds 
  of 
  

   Richelsdorf 
  and 
  Mansfeld 
  ; 
  they 
  also 
  occur 
  in 
  considerable 
  numbers 
  

   in 
  our 
  own 
  Magnesian 
  Limestone 
  ; 
  but 
  when 
  we 
  descend 
  into 
  the 
  

   Coal-measures, 
  although 
  Palceoniscus 
  is 
  abundant 
  and 
  Platysomus 
  

   not 
  scarce 
  in 
  some 
  localities, 
  Pyc/opterus 
  is 
  partial 
  in 
  occurrence, 
  

   and 
  Acrolepis 
  so 
  scarce 
  that 
  I 
  have 
  only 
  seen 
  it 
  from 
  one 
  locality, 
  

   namely, 
  Carluke 
  in 
  Lanarkshire 
  ; 
  so 
  that 
  I 
  know 
  of 
  no 
  one 
  locality 
  

   of 
  Coal-measure 
  age 
  in 
  which 
  they 
  simultaneously 
  occur. 
  

  

  Postscript. 
  — 
  Since 
  the 
  above 
  notice 
  was 
  written 
  I 
  have 
  received 
  a 
  

   letter 
  from 
  Mr. 
  Clarke, 
  dated 
  April 
  7, 
  1863, 
  in 
  which 
  he 
  says, 
  

   " 
  The 
  Fish 
  with 
  heterocercal 
  tail 
  like 
  Palceoniscus 
  comes 
  from 
  my 
  

   Wianamatta 
  beds, 
  which 
  are 
  above 
  the 
  beds 
  with 
  the 
  Cockatoo 
  Island 
  

   Fish, 
  and 
  therefore 
  fully 
  from 
  1000 
  to 
  2000 
  feet 
  above 
  the 
  Coal- 
  

   beds 
  at 
  Newcastle 
  in 
  which 
  the 
  Urosthenes 
  was 
  found." 
  — 
  " 
  The 
  

   sequence 
  of 
  beds 
  is 
  this 
  : 
  — 
  

  

  - 
  " 
  — 
  = 
  Wiauatnatta 
  beds 
  (Palceunisc-us, 
  &c). 
  

  

  = 
  ^ 
  : 
  ^ 
  ;; 
  ^1R 
  ^ 
  ^^H1E 
  Cockatoo 
  beds 
  (Cleithrulepis 
  and 
  Myriolepis). 
  

   === 
  z 
  Hawkesbury 
  rocks. 
  

  

  Coal-seams 
  (Urosthenes). 
  

  

  Marine 
  beds 
  with 
  Coal-seams. 
  

  

  Plants, 
  considered 
  to 
  be 
  Oolitic 
  Dy 
  Prof. 
  M'Coy, 
  occur 
  throughout.'' 
  

  

  [P. 
  M. 
  G. 
  E.] 
  

  

  EXPLANATION 
  OF 
  PLATE 
  I. 
  

  

  Fig. 
  1. 
  Myriolepis 
  Clarkei, 
  Eg. 
  From 
  a 
  photograph. 
  Nearly 
  two-thirds 
  the 
  

   natural 
  size. 
  

  

  2. 
  Cleithrolepis 
  granulahis, 
  Eg. 
  From 
  a 
  specimen. 
  Natural 
  size. 
  

  

  3. 
  Cleithrolepis 
  granulatus, 
  Eg. 
  From 
  a 
  photograph. 
  Kather 
  more 
  than 
  

  

  one-half 
  the 
  natural 
  size. 
  

  

  4. 
  Palceoniscus 
  antip<jdcu$<~Kz. 
  From 
  a 
  photograph. 
  One-half 
  the 
  natural 
  

  

  size. 
  

  

  